Garrison Dam Tailrace is a freshwater site offering a unique environment for advanced divers and snorkelers. The water originates from the bottom of Lake Sakakawea, resulting in consistently cold temperatures that range from 0°C to 15.5°C. Divers should expect moderate currents and visibility between 3 and 6 metres. Depths at the site reach up to 9 metres. Access is via a shore entry. Due to the nature of the tailrace, hazards include boat traffic, strong currents, and low visibility. Facilities available at the site include parking, toilets, and showers.

Scoria Bay Formations is a freshwater site in the United States characterised by rugged red scoria rock formations. The underwater landscape features submerged petrified wood and coal veins, which are particularly visible when water levels are lower. Depths range from 2 to 15 metres, with an average of 13 metres. Conditions include mild currents and visibility between 4 and 6 metres. The site is accessible by both shore and boat. Divers and snorkellers should be aware of cold water temperatures, boat traffic, and low visibility. Facilities available at the site include parking, toilets, showers, and boat charter services.

Indian Hills in Good Bear Bay offers a freshwater snorkeling experience defined by rugged points and underwater shelves. The site features varied depth contours and drop-offs suitable for intermediate snorkelers. Access is available via both shore and boat. Conditions vary, with water temperatures reaching 20°C during the July to August swimming season, while April temperatures remain very cold between 0.5°C and 3.3°C. Divers and snorkelers should be aware of potential hazards, including boat traffic, cold water, and low visibility. Facilities at the site include parking, toilets, and showers.